Spindle swing



March 5, 1935. R. J. EARTHOLGMEW SPINDLE SWING Filed Sept. 2, 1933 IN VEN TOR.

A TTORNEYS? the. parts in starting position.

Patented Mar. 5, 1935 P T N: oFFieE V SFINDEE Robert J. "Bartholomew, 'signor to -Fletcher =Wor SWiNG Germantown, Pa; asks, Incorporated, Philadelphia, Pan; a; corporation 'of Pennsylvania Application September-"2,

1933, Serial Noxssstvs' 1 8-Claims. (Cl.-11'7- 28).

This invention is directed toan improvement in spindle swings and'has for one of its objects the provision of a construction which :Whileof more or less general application to twisting. machines is particularly useful-in the rayon industry. 7 v

In the rayon industry large aluminum tubesor cans are used to collect the'rayon as it comes from the spinnerets. These tubesor cans are later placedon the spindles of'a'twister. The whorl which'drives, the spindle is held against the belt by a light spring, and inasmuch -as-the tubes by reason of their weight have a great moment of inertia they are very slow in starting and an excessive amount of slack twistis caused by the slippage whichoocurs. 4

A further object ofthe present invention, therefore, is to provide a construction in which the tubes or cans may be started quickly, without the use of a heavy spring which would make the spindle bearing pressure'objectionably high while running, my construction providingfor keeping the spindle bearing pressures low while-running.

A further object-of the present invention is the provision of a spindle swing construction --in which-provision is made forthree positions of the swing-a starting? position in which the whorl is pressed very firmly against the belt resultingin an appreciable arc of contactunder considerable pressure whereby slippage in starting despite the high moment of inertiaof the tube or can is reduced to aminimum; an as or braking position in which thewhorl is out of contact with the belt entirely; and'anintermediate or driving position in which the whorl contacts with the driving belt with only a slight pressure, practically only a line contact. 7

In the drawing accompanying this application:

Fig. 1 is an elevational view ofan embodiment of my invention; a

Fig. 2 is a section on theline 2-2 of Fig. 1;

Fig. 3 isasection on the'line 3 -3 of-Fig. 1;

and a r Fig. 4'isa plan View partly in section showing vReferring to the drawing in detail, 1-desig nates a spindleblade on which is mounteda bobbin shown for purposes ofillustrationasa tube or can 2 such as employed in the rayon industry. -3 is the whorl which as-willfbe under.- stood is driven by a belt 4. a, Y

'Itwill be understood-that in a spinningmachine a number of' spindleblades are; driven off the one'belt.

The spindle base; 5 is carried in a swing bracket designated 6 mounted for movement about a swing stud 7, this stud in turn being'mounted intermediate the ends of a casting 8 which is clamped to apair of tubular members 9 which take-the place of the-usual-rails eta-spinning .5 machine. 7

The stud '7 carries a spring 10 the tension-0f whichmay beadjusted by a handnut or screw collar 11, the collar being heldinadjusted position by locking screw 12. The spring lo is 10 adapted to hold the whorl 3 against the-driving belt when the machine'; is running,

The swing stud 7-also carriesanarm '13'which is movable about a vertical axis on the stud relatively to the swing bracketfi. -This arm 134 s 15 provided with a cam slot'l l.

The arm 13 lies below the swing bracket 6 and the hub'of the arm is provided with a'pair of spaced lugs 15 adapted to cooperate with-a lug l6 depending fromtheunderside of the swing 20 bracket. It is to be notedthat while the lugs 15 are at either side-of the lug 16 their spacing i is such as to permit of some; movement of the arm 13 without that movement being imparted to the swing bracket, Ifhe purpose of this w'ill 25 be brought out hereinafter in the description of the operation of my improved apparatus. .7

The cam slot lei cooperates with aroller 1''? which is carried on the-inner end of an operatinglever-18 which is pivoted on the outer end of the casting 8as shown at 19-for instancein Fig.2.

The casting 8-is providedzwith avertically extending stud 20 carrying a spring brake arm 21 equipped at its free end witha brakelining 22 adapted to engage the whorl 3=when theparts are in braking-or off position.

As-abeveexplained one of the objects of the present invention is to provide a swing bracket 7 construction in which heavy tubes, teams or A0 bobbins may be readily and quicklystarted, the parts being movable to a running position after the bobbin has been brought up to speed at which time the whorl only has a line contact with the belt so that the pressure onthe spindle base bearings'is notexcessive.

Whenthe machine is at rest the whorl 3 is in the--dotted lineposition of-Fig-4= engaging the brake 22. At thesame time the arm 13 is in the dotted line-position of the same figure.

The-handle23 of the lever 18 is then swung downwardly and to the right, that :is to "say,

anti-clockwiseaboutits pivot-l9, the roller l't by its engagement with the cam slot 14 in the arm .13 moving this armtogether with the lugs 15 -5 on the hub thereof clockwise. This carries one of the lugs 15 on the hub of the arm 13 into engagement with the lug 16 on the spindle base and swings the swing bracket 6 about the stud 7 in a clockwise direction and into engagement with the belt 4. This moves the whorl 3 to starting position with respect to the belt 4 as shown in Fig. 4, the whorl engaging the belt with a strong pressure in excess of that of the spring 10, so that the whorl is pressed against the belt to provide an appreciable arc of contact.

The swing bracket 6 has therefore been moved from braking position to starting position, i. e. from one extreme tov the other.

Due to the firm pressure of the whorl agains the belt the whorl will be quickly brought up to speed without slipping, and then the handle 23 of the lever "18 is moved anti-clockwise slightly sufiicient to disengage the lugs 15 from contact with the lug 16 so that the whorl 3 is now held in running position with respect to the driving belt 4 by the pressure of the spring 10. a

It will be seen, therefore, that the construction of this invention provides a swing bracket arrangement in which means have been provided for having the swing bracket take three different positions-one, a braking position at which time the whorl is out of contact entirely with the driving belt and the brake applied; another starting position at which time the whorl is manually moved into engagement with the driving belt so as to engage the same with an appreciable arc of contact thereby having-the whorl and belt engage each other with sufiicient pressure to prevent slipping of the belt and to insure proper starting of the tube can or bobbin 2 despite the relatively great moment of inertia of the same; and still another position, i. e. running position, at which time the whorl is held against the driving belt in the usual way by the spring 10.

It is to be understood, of course, that the brake arm 21 may be of a flexible nature as shown or rigid as desired.

It is to be appreciated also that the roller 17 may be operated by foot power instead of by a hand lever without departing from the spirit and scope of this invention.

It will be appreciated still further that the cam slot 14 is so shaped that the arm 13 will remain in adjusted position, i. e., starting, running and braking positipn as the case may be.

What I claim is:

1. In a machine of the class described, the combination of a spindle swing bracket, and means including a movable member engageable with the swing bracket for selectively maintaining the swing bracket in starting position, braking position and an intermediate running position.

2. In a machine of the class described, the combination of a spindle swing bracket, a whorl carried thereby, a belt for engaging the whorl for driving the same, a brake for the whorl, and means including a member engaging said swing bracket and an operating lever cooperating with said member for selectively maintaining the whorl in engagement with the said belt for starting, in engagement with the brake for stopping, and in a position intermediate the two mentioned positions for running.

3. In a machine of the class described, the combination of a spindle swing bracket, a whorl carried thereby, a belt for engaging said whorl to drive the same, a spring for holding the whorl against said belt for running, a brake for the whorl, two abutments on the swing bracket, a movable member having two surfaces cooperable with the abutments of the bracket, movement of said movable member to one extreme position causing the whorl to be moved to a definite position against the brake, movement of the member to the other extreme position causing the whorl to be moved to another definite position against said belt, said movable member having an intermediate position in which neither of the said surfaces contacts an abutment.

4. In a machine of the class described, the combination of a spindle swing bracket, a whorl, a driving belt for engaging the whorl to drive the same, a brake, a pivoted arm for actuating the whorl into engagement with the driving belt with maximum pressure to start the whorl, and for withdrawing the whorl out of engagement with said belt and into engagement with said brake for stopping the whorl, and a spring for holding the whorl in an intermediate position in engagement with said belt with minimum pressure for driving the whorl.

5. In a machine of the class described, a spindle swing bracket, a stud on which the bracket is pivoted, an actuating arm pivoted on said stud and having movement relatively to said bracket, a spring, a driving belt, a whorl carried by the bracket, a brake for the whorl, and means for pivoting said arm into engagement with said bracket to contact the whorl with said belt with maximum pressure to start the whorl, and to withdraw said whorl from engagement with the belt and into engagement with said brake to stop the whorl, and means for holding the said arm out of engagement with said bracket to permit said spring to hold the whorl against the belt with minimum pressure for running.

6. In a machine of the class described, the combination of a swing bracket, a whorl carried thereby, a driving belt for the whorl, a spring for holding the whorl against said belt with a running pressure, a brake for the whorl, an arm pivotal about the axis of pivot of the swing bracket, spaced lugs on said arm cooperable with a lug on'the swing bracket whereby pivoting of said arm effects pivoting oi the swing bracket, and means for actuating said arm to move the swing bracket to one side of the running position of the bracket to increase the pressure of the whorl against the belt for starting purposes, and to move the arm in the opposite direction to move the swing bracket to the other side of running position into engagement with said brake to stop the whorl.

7. In a machine of the class described, a spindle swing bracket, a whorl carried thereby, a driving belt for the whorl, a brake for the whorl, an arm pivotal about the axis of pivot of the swing bracket, said arm being provided with a cam slot, spaced lugs on said arm cooperable with a lug on the swing bracket, a roller in said cam slot, and an arm for actuating said roller to efiect pivoting of said first mentioned arm, movement of the last mentioned arm in one direction to one position effecting engagement of the whorl with the driving belt under maximum pressure for the starting operation, movement spring adapted when the last mentioned arm is moved in the first mentioned direction to extreme position to hold the swing bracket in an intermediate position for the running operation.

8. In a machine of the class'described, the combination of a spindle swing bracket, and

means including a member movable about a vertical axis engageable with the swing bracket for selectively maintaining the swing bracket in starting position, off or stationary position and an intermediate running position.

' ROBERT J. BARTHOLOMEW, 

